I have this same tunnel my cats love it and it is noisy sounds like a loud plastic grocerie bag being played in. my cats are such nuts they run threw it chasing each other and hiding in it to ambush each other lol so funny.
i have one question for you, was it boys or girls that have used it? i have to ask before bidding because i have 4 cats. my girls are calm and happy but if a male has been in it my 2 boys will be bad and destroy it. lol let me know please so i know if i can bid :) and i fanned you